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One electric generator produces power at 220 V potential difference. Its internal resistance is r = 10 `Omega` . Find power wasted in external resistance R = 100 `Omega`

A

484 W

B

400 W

C

441 W

D

369 W

Text Solution

Verified by Experts

The correct Answer is:
B
Total resistance of circuit,
R.=R+r
=100+10
=110 `Omega`
`therefore` Current in the circuit , `I=V/(R.)=220/110`=2A
`therefore` Power wasted in external resistance ,
`P=I^2R=(2)^2 xx 100`
=400 W
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